How to wait on multiple blocking queues in parallel?

Question

I have two separated blocking queues. The clients usually use either the first of the second blocking queue to retrieve elements to be processed.

In some case, the c

Answer 1

You could try using the poll method in some sort of loop to only wait a specified amount of time for one queue before polling the other one.

Other than that, I'd say running the blocking operations for each queue on separate threads and providing a callback interface to your main application is another, slightly more complex, option.